Buggy code:
public class MessagingService implements IFailureDetectionEventListener { private static int version_ = 1 ; private static SerializerType serializerType_ = SerializerType . BINARY ; public static final int PROTOCOL_MAGIC = - 900387334 ; public static final String responseVerbHandler_ = "RESPONSE" ; private static ExpiringMap < String , IAsyncCallback > callbackMap_ ; private static ExpiringMap < String , IAsyncResult > taskCompletionMap_ ; private static Map < StorageService . Verb , IVerbHandler > verbHandlers_ ; private static ExecutorService messageDeserializerExecutor_ ; private static ExecutorService streamExecutor_ ; private static NonBlockingHashMap < InetAddress , OutboundTcpConnectionPool > connectionManagers_ = new NonBlockingHashMap < InetAddress , OutboundTcpConnectionPool > ( ) ; private static Logger logger_ = Logger . getLogger ( MessagingService . class ) ; public static final MessagingService instance = new MessagingService ( ) ; public static int getVersion ( ) { } public Object clone ( ) throws CloneNotSupportedException { } protected MessagingService ( ) { } public byte [ ] hash ( String type , byte [ ] data ) { } public void convict ( InetAddress ep ) { <START_BUG> MessagingService . logger_ . debug ( ( "Resetting<seq2seq4repair_space>pool<seq2seq4repair_space>for<seq2seq4repair_space>" + ep ) ) ; <END_BUG> MessagingService . getConnectionPool ( ep ) . reset ( ) ; } public void listen ( InetAddress localEp ) throws IOException { } public static OutboundTcpConnectionPool getConnectionPool ( InetAddress to ) { } public static OutboundTcpConnection getConnection ( InetAddress to , Message msg ) { } public void registerVerbHandlers ( StorageService . Verb verb , IVerbHandler verbHandler ) { } public IVerbHandler getVerbHandler ( StorageService . Verb type ) { } public String sendRR ( Message message , InetAddress [ ] to , IAsyncCallback cb ) { } public void addCallback ( IAsyncCallback cb , String messageId ) { } public String sendRR ( Message message , InetAddress to , IAsyncCallback cb ) { } public String sendRR ( Message [ ] messages , InetAddress [ ] to , IAsyncCallback cb ) { } public void sendOneWay ( Message message , InetAddress to ) { } public IAsyncResult sendRR ( Message message , InetAddress to ) { } public void stream ( String file , long startPosition , long endPosition , InetAddress from , InetAddress to ) { } public static void shutdown ( ) { } public static void receive ( Message message ) { } public static IAsyncCallback getRegisteredCallback ( String key ) { } public static void removeRegisteredCallback ( String key ) { } public static IAsyncResult getAsyncResult ( String key ) { } public static ExecutorService getDeserializationExecutor ( ) { } public static void validateMagic ( int magic ) throws IOException { } public static boolean isEqual ( byte [ ] digestA , byte [ ] digestB ) { } public static int getBits ( int x , int p , int n ) { } public static ByteBuffer packIt ( byte [ ] bytes , boolean compress ) { } public static ByteBuffer constructStreamHeader ( boolean compress ) { } }

Fix:
MessagingService . logger_ . trace ( ( "Resetting<seq2seq4repair_space>pool<seq2seq4repair_space>for<seq2seq4repair_space>" + ep ) ) ;